The new Arnold & Son TES Tourbillon has a beautiful tourbillon carriage visible at 6 o’clock on the dial side of this watch, but it is the sapphire crystal barrel bridge — which allows a perfect view of the open worked barrel and wheels — that sets this timepiece apart.

The 18K red gold case, with stepped bezel, measures 44 mm in diameter, and features a fully polished finish, except on the sides of the lugs which are brushed. A cambered sapphire crystal, with an anti-reflective coating on both sides, protects the dial side. The caseback features a flat sapphire crystal.

Uniquely, the main plate is in a anthracite grey finish. It is decorated with an old guilloché pattern that is found on the cases of antique Arnold & Son pocket watches. The main plate is also skeletonzied around the barrel and the tourbillon carriage.

The watch is powered by an in-house hand-wound 3Hz A&S8100 caliber, with 19 jewels and an 80-hour power reserve. The nickel-silver movement features a sapphire crystal barrel bridge, as we mentioned above, as well as a rose gold treated bridges that have been hand chamfered with polished edges. The wheels have been circular satin-finished, and are hand-chamfered with polished edges. Everything is finished to perfection, from the screwed gold chatons, to the tourbillon cage and bridge which are mirror-polished, to the screws that are bevelled and have mirror-polished heads.

The Arnold & Son TES Tourbillon displays hours, minutes, a 60-second tourbillon. Water-resistance is 30 meters. This timepiece will be produced in a limited edition of 28 pieces. It is paired with a hand-stitched black or brown alligator leather. (Ref. 1SJAR.V01A.C112A) Learn more at Arnold & Son.